/Engine/Source/Runtime/CoreUObject/Public/UObject/Linker.h
Return if a resource has the specified other resource in its outer chain
true if the resource pointed by LinkerIndex is in the resource pointed by OuterIndex
bool ResourceIsIn ( [FPackageIndex](API\Runtime\CoreUObject\UObject\FPackageIndex) LinkerIndex, [FPackageIndex](API\Runtime\CoreUObject\UObject\FPackageIndex) OuterIndex ) const